Grand Chamber of the European Court of Human Rights to Conduct Landmark Hearing on Osman Kavala Case Amid Concerns Over Turkish Judicial Independence

The Grand Chamber of the European Court of Human Rights (ECtHR) is scheduled to hear oral pleadings on March 25, 2026, in a pivotal case concerning the ongoing detention of Turkish human rights defender and philanthropist Osman Kavala. The hearing, which represents a critical juncture in the long-standing legal battle between Kavala and the Republic of Türkiye, comes at a time when international observers are increasingly alarmed by the systemic erosion of judicial independence within the country. The Turkey Human Rights Litigation Support Project (TLSP), Human Rights Watch (HRW), and the International Commission of Jurists (ICJ) jointly announced the hearing date, emphasizing that the case transcends the plight of a single individual and speaks to the broader state of the rule of law in Europe.

Osman Kavala has remained in continuous detention since October 2017, a period spanning nearly a decade, despite multiple binding judgments from the ECtHR mandating his immediate release. The upcoming Grand Chamber session follows a new application submitted by Kavala in early 2024, which alleges a series of fresh violations occurring after the court’s initial 2019 ruling. By November 2025, the case was officially referred to the Grand Chamber, the highest judicial tier of the ECtHR, reserved for cases that raise serious questions affecting the interpretation of the European Convention on Human Rights.

The Joint Third-Party Intervention and the "Captured" Judiciary

In preparation for the March 25 hearing, the TLSP, HRW, and ICJ submitted a comprehensive third-party intervention to the court. The submission provides a detailed analysis of how the Turkish government has systematically undermined the independence of the judiciary to facilitate politically motivated prosecutions. The organizations argue that the detention of Kavala is not an isolated judicial error but the result of a deliberate "capture" of the judicial authority by the ruling political coalition, consisting of the Justice and Development Party (AKP) and the Nationalist Movement Party (MHP).

"Osman Kavala’s unlawful and politically motivated detention has been allowed to persist for the best part of a decade in part because Türkiye’s judicial system lacks independence," stated Ayşe Bingöl Demir, director of TLSP. She expressed hope that the Grand Chamber would scrutinize the mechanisms through which political authorities have assumed control over state institutions, effectively turning the courts into instruments of executive will.

The intervention highlights the degradation of the Council of Judges and Prosecutors (HSK), the body responsible for the appointment, promotion, and disciplining of judicial personnel. Following the 2017 constitutional amendments, legal safeguards intended to protect the HSK from executive interference were largely dismantled. This allowed the presidency and parliament to fill the council with individuals aligned with the government’s political agenda. Consequently, the HSK has been accused of creating a "climate of fear" among judges, using its disciplinary powers to punish those who issue rulings unfavorable to the government and rewarding those who facilitate the suppression of dissent.

A Chronology of the Kavala Legal Saga

To understand the gravity of the March 2026 hearing, it is necessary to examine the nearly nine-year timeline of Kavala’s legal odyssey:

• October 18, 2017: Osman Kavala is detained at Istanbul’s Atatürk Airport. He is subsequently charged with "attempting to overthrow the constitutional order" and "attempting to overthrow the government" in connection with the 2013 Gezi Park protests and the 2016 attempted coup.
• December 10, 2019: The ECtHR issues its first major ruling, finding that Kavala’s detention was carried out in the absence of evidence to support a reasonable suspicion of an offense. The court concludes that his arrest served an "ulterior purpose"—namely, to silence him and dissuade other human rights defenders.
• February 18, 2020: A Turkish court acquits Kavala in the Gezi Park trial. However, before he can be released from Silivri Prison, he is immediately re-arrested on separate charges of "political or military espionage."
• April 25, 2022: Despite international outcry, Kavala is convicted of attempting to overthrow the government and sentenced to aggravated life imprisonment without the possibility of parole. Seven other defendants receive 18-year sentences.
• July 11, 2022: In a highly exceptional move, the ECtHR Grand Chamber confirms in infringement proceedings—initiated by the Council of Europe’s Committee of Ministers—that Türkiye failed to fulfill its obligation to implement the 2019 judgment.
• Early 2024: Kavala files a new application to the ECtHR, citing continuous rights violations and the failure of domestic remedies, including the Turkish Constitutional Court.
• November 2025: The ECtHR decides to refer the new application to the Grand Chamber for an expedited hearing.

Systematic Erosion of Judicial Safeguards

The organizations’ intervention provides a grim data-driven look at the state of the Turkish judiciary. Since the 2016 coup attempt, approximately 4,000 judges and prosecutors—roughly one-third of the total judiciary at the time—were dismissed from their posts. Many were replaced by individuals who had not undergone traditional, transparent recruitment processes but were instead selected through criteria that critics argue prioritized political loyalty over legal expertise.

Temur Shakirov, director of the Europe and Central Asia program at the ICJ, noted that the HSK has become an instrument of influence rather than a safeguard. "Its powers are used to create a climate of fear and submission among judges and prosecutors, including through arbitrary measures affecting their careers and rights," Shakirov said. This environment has led to a judiciary that frequently disregards the rulings of the Turkish Constitutional Court and the ECtHR, creating a state of legal uncertainty and institutionalized defiance of international law.

The intervention also argues that the Turkish Constitutional Court (AYM) can no longer be considered an "effective remedy" for human rights violations under Article 13 of the European Convention. The groups point to a lack of independence among the AYM’s members and a non-transparent case prioritization policy that allows the court to delay rulings on politically sensitive cases indefinitely, while fast-tracking others. This selectivity facilitates executive interference and leaves detainees like Kavala in a legal limbo where domestic appeals are effectively dead ends.

The Failure of Domestic Remedies and Article 13

Article 13 of the European Convention on Human Rights stipulates that everyone whose rights and freedoms are violated shall have an effective remedy before a national authority. The joint intervention by TLSP, HRW, and ICJ posits that this right has become a dead letter in Türkiye for those perceived as dissidents. By failing to implement ECtHR judgments and allowing domestic courts to circumvent higher rulings through "unreasonable interpretations of criminal law," the Turkish state has dismantled the legal protections intended to prevent arbitrary detention.

Aisling Reidy, senior legal adviser at Human Rights Watch, emphasized that Turkish judicial authorities have subverted criminal proceedings by disregarding core procedural rights. "This is also reflected in the persistent defiance of European Court of Human Rights judgments and the standards established in its case law," Reidy noted. The intervention highlights that the government’s strategy often involves "judicial ping-pong," where a defendant is acquitted on one charge only to be immediately detained on another nearly identical charge, effectively resetting the legal clock and bypassing release orders.

Broader Implications and the Council of Europe

The Kavala case has become a litmus test for the authority of the Council of Europe (CoE). Under Article 46 of the Convention, member states are legally bound to comply with the final judgments of the ECtHR. Türkiye’s refusal to release Kavala has triggered the CoE’s "infringement procedure" for only the second time in the organization’s history (the first being the case of Ilgar Mammadov v. Azerbaijan).

If the Grand Chamber issues a further ruling against Türkiye following the March 25 hearing, the Committee of Ministers could face the unprecedented task of considering further sanctions. These could range from the suspension of Türkiye’s voting rights in the Council of Europe to, in the most extreme scenario, expulsion from the organization. Such a move would have profound geopolitical implications, potentially severing one of the last formal legal ties between Türkiye and the European human rights framework.

Analysis of Potential Outcomes

Legal analysts suggest that the Grand Chamber’s decision to hear the case indicates that the court is prepared to address the systemic nature of the violations. Rather than merely ruling on the specifics of Kavala’s new detention period, the court may choose to issue a broader judgment regarding the structural lack of judicial independence in Türkiye. Such a ruling would bolster the arguments of human rights defenders who claim that the Turkish legal system requires fundamental reform, not just case-by-case corrections.

Furthermore, the hearing will likely address the concept of "aggravated life imprisonment." Human rights groups argue that this sentence, which in Kavala’s case is served under strict isolation with no possibility of parole, constitutes a violation of the prohibition against inhuman or degrading treatment.

As the March 25, 2026, hearing approaches, the international community remains focused on Strasbourg. The outcome will not only determine the future of Osman Kavala—who by then will have spent over 3,000 days in prison—but will also signal whether the European Court of Human Rights can effectively enforce its mandates against member states that choose to prioritize political expediency over the rule of law. For now, the case remains the most significant challenge to the integrity of the European human rights system in the 21st century.